Vitamin K is the essential vitamin involved in the process of blood coagulation. It plays a critical role in the synthesis of specific proteins known as clotting factors, which are produced in the liver.
These clotting factors, such as prothrombin (Factor II), are necessary for the proper formation of blood clots. Without adequate Vitamin K, the blood clotting process is impaired, which can lead to excessive bleeding even from minor injuries.
Thus, Vitamin K is indispensable for maintaining hemostasis and preventing hemorrhagic conditions.
Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines.
(i) (CH3 )2CHNH2 (ii) CH3 (CH2 )2NH2 (iii) CH3NHCH(CH3 )2
(iv) (CH3 )3CNH2 (v) C6H5NHCH3 (vi) (CH3CH2 )2NCH3 (vii) m–BrC6H4NH2
Give one chemical test to distinguish between the following pairs of compounds.
(i) Methylamine and dimethylamine
(ii) Secondary and tertiary amines
(iii) Ethylamine and aniline
(iv) Aniline and benzylamine
(v) Aniline and N-methylaniline
Account for the following:
(i) pKb of aniline is more than that of methylamine.
(ii) Ethylamine is soluble in water whereas aniline is not.
(iii) Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.
(iv) Although amino group is o– and p– directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.
(v) Aniline does not undergo Friedel-Crafts reaction.
(vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines. (vii) Gabriel phthalimide synthesis is preferred for synthesising primary amines.
Assertion (A): Vitamin D cannot be stored in our body.
Reason (R): Vitamin D is fat-soluble vitamin and is not excreted from the body in urine.
Scurvy is caused due to deficiency of: